A source close to the couple tells ET that Maltby and Calafiore "are completely smitten with each other. Her friends absolutely adore him and he’s been saying she’s the most amazing woman he’s ever met, and he can’t wait for her to meet his family and friends."

Maltby is best known by fans for competing on Nick Viall's season of The Bachelor in 2017. She later appeared on season four of Bachelor in Paradise, where she shared a steamy kiss with Adams (who is now dating Sarah Hyland), but the two decided they were better as friends.

Calafiore appeared on season 18 of Big Brother, where he struck up a showmance with fellow houseguest Zakiyah Everette -- after his proposal to another woman was denied before going on the show.